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[104.155.83.17]) by smtp.gmail.com with ESMTPSA id ffacd0b85a97d-42b53e7ae16sm32728666f8f.3.2025.11.18.05.56.17 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Tue, 18 Nov 2025 05:56:17 -0800 (PST) From: Tudor Ambarus Subject: [PATCH v2 0/7] soc: samsung: exynos-chipid: add gs101 support Date: Tue, 18 Nov 2025 13:56:07 +0000 Message-Id: <20251118-gs101-chipid-v2-0-e9f1e7460e35@linaro.org> MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: 7bit X-B4-Tracking: v=1; b=H4sIAPd6HGkC/3XMywrCMBCF4Vcps3YkEy8Nrvoe0kVsbgOSlESCU vLuxu5d/gfOt0GxmW2B27BBtpULp9hDHgZYgo7eIpveIIW8kDgR+kKCcAm8skFn1NlopZ2WDvp lzdbxe+fuc+/A5ZXyZ9cr/dY/UCUUaEZlSIzXhyQxPTnqnI4pe5hba1+rSZ+4qQAAAA== X-Change-ID: 20251031-gs101-chipid-fd84da8afa2f To: Rob Herring , Krzysztof Kozlowski , Conor Dooley , Alim Akhtar , Peter Griffin , =?utf-8?q?Andr=C3=A9_Draszik?= , Srinivas Kandagatla Cc: Krzysztof Kozlowski , semen.protsenko@linaro.org, willmcvicker@google.com, kernel-team@android.com, devicetree@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-samsung-soc@vger.kernel.org, linux-kernel@vger.kernel.org, Tudor Ambarus , Krzysztof Kozlowski X-Mailer: b4 0.14.2 X-Developer-Signature: v=1; a=ed25519-sha256; t=1763474177; l=2844; i=tudor.ambarus@linaro.org; s=20241212; h=from:subject:message-id; bh=Kr8mEMg8GUIR0ES8nTKUQqU7gngQ/9e8fD/J6xaVWA8=; b=LVRWlNp4X7IcullcpPaadgDLyqzRT2qebSKjsvSfkZjCX4eK3g7QnnM3DOTUjINKB9zjC3vfk wNdkuEWFaYFAUAUWVq3uOk+QcZszuFH+ip5x5/d7jyRSJQU4A9nA01Z X-Developer-Key: i=tudor.ambarus@linaro.org; a=ed25519; pk=uQzE0NXo3dIjeowMTOPCpIiPHEz12IA/MbyzrZVh9WI= X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20251118_055620_502325_14A008FA X-CRM114-Status: GOOD ( 14.42 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org Dependency ========== Typical dependency of the DT patch depending on the bindings patch, thus the bindings patch could go via the Samsung SoC tree with Srinivas's ack. Description =========== GS101 is different (but also e850 and autov9 I assume) from the SoCs that are currently handled by the exynos-chipid driver because the chip ID info is part of the OTP registers. GS101 OTP has a clock, an interrupt line, a register space (that contains product and chip ID, TMU data, ASV, etc) and a 32Kbit memory space that can be read/program/locked with specific commands. On GS101 the "ChipID block" is just an abstraction, it's not a physical device. When the power-on sequence progresses, the OTP chipid values are loaded to the OTP registers. Add the GS101 chip ID support. The support is intentionally added in the exynos-chipid driver, and not in a dedicated Exynos OTP driver, because we estimate that there will not be any OTP consumers in the kernel other than the chip ID/SoC interface. The downstream GS101 drivers confirm this supposition. Testing ======= root@google-gs:~# cat /sys/devices/soc0/family Samsung Exynos root@google-gs:~# cat /sys/devices/soc0/machine Oriole root@google-gs:~# cat /sys/devices/soc0/revision 11 root@google-gs:~# cat /sys/devices/soc0/soc_id GS101 Signed-off-by: Tudor Ambarus --- Changes in v2: - complete rework, treat it as a new patch set please. - bindings were reviewed at: - Link: https://lore.kernel.org/linux-samsung-soc/27a5521cd7ddbed0e870ac416dc829722f1b36a5.camel@linaro.org/T/#me139353334db535806ca6462ae1e86b01ff032a7 - addressed Andre's s/if of/is of - part of the cleaning patches are from this trivial series: - Link: https://lore.kernel.org/linux-samsung-soc/20251112-chipid-trivial-v1-0-ec2dea03bd83@linaro.org/ - Link to v1: https://lore.kernel.org/r/20251031-gs101-chipid-v1-0-d78d1076b210@linaro.org --- Tudor Ambarus (7): dt-bindings: nvmem: add google,gs101-otp soc: samsung: exynos-chipid: add google,gs101-otp support soc: samsung: exynos-chipid: use devm action to unregister soc device soc: samsung: exynos-chipid: use dev_err_probe where appropiate soc: samsung: exynos-chipid: rename method soc: samsung: exynos-chipid: downgrade dev_info to dev_dbg for soc info arm64: dts: exynos: gs101: add OTP node .../bindings/nvmem/google,gs101-otp.yaml | 56 ++++++++ arch/arm64/boot/dts/exynos/google/gs101.dtsi | 7 + drivers/soc/samsung/exynos-chipid.c | 148 +++++++++++++++------ 3 files changed, 168 insertions(+), 43 deletions(-) --- base-commit: 4b67e4c65c1e0740ac12bd0d790eb5a9d0091aaa change-id: 20251031-gs101-chipid-fd84da8afa2f Best regards, -- Tudor Ambarus